Hyperfine spectra of trapped Bosons in optical lattices

Abstract

We calculate the interaction induced inhomogeneous broadening of spectral lines in a trapped Bose gas as a function of the depth of a three-dimensional cubic optical lattice. As observed in recent experiments, we find that the terraced "wedding-cake" structure of Mott plateaus splits the spectrum into a series of discrete peaks. The spectra are extremely sensitive to density corrugations and trap anharmonicities. For example, even when the majority of the cloud is superfluid the spectrum displays discrete peaks.

7 pages, 5 figures, revtex4

References in corpus (7)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Spatial quantum noise interferometry in expanding ultracold atom clouds
• Imaging the Mott Insulator Shells using Atomic Clock Shifts
• Quantum Monte Carlo simulations of confined bosonic atoms in optical lattices
• Formation of spatial shell structures in the superfluid to Mott insulator transition
• Structure and stability of Mott-insulator shells of bosons trapped in an optical lattice
• On-site number statistics of ultracold lattice bosons

Cited by in corpus (8)

• Theory of correlations between ultra-cold bosons released from an optical lattice
• Probing condensate order in deep optical lattices
• Spectroscopy of dipolar fermions in 2D pancakes and 3D lattices
• Magnetic phase transition in coherently coupled Bose gases in optical lattices
• Many-body physics in the radio frequency spectrum of lattice bosons
• Generic features of the spectrum of trapped polarized fermions
• Explanation of 100-fold reduction of spectral shifts for hydrogen on helium films
• Theoretical Analysis on Spectroscopy of Atomic Bose-Hubbard Systems